Apparatus for delivering liquids and viscous materials



May 20, 1947. H. PARKER ETAL 2,420,970

APPARATUS FOR DELIVERING LIQUIDS AND vIscoUs MATERIALS Filed Nov; 11,1944 3 Sheets-Sheet l,

\NVENTORS May 20, 1947. H. PARKER ETAL APPARATUS FOR DELIVERING LIQUIDSAND VISCOUS MATERIALS 3 Sheets-Sheet 2 Filed Nov. 11, 1944 lNVEHTORS'May 20, 1947. H. PARKER ET AL APPARATUS FOR DELIVERING =LIQUIDS ANDVISCOUS MATERIALS Filed Nov. 11, 1944 3 Sheets-Sheet 3 FIELG.

Patented May 20, 1947 APPARATUS FOR DELIVERING LIQUIDS AND VISCOUSMATERIALS Harry Parker, Kings Heath, Birmingham, and

Thomas Carlyle Ellison Rowland, Solihull,

England Application November 11, 1944, Serial No. 563,066

In Great Britain February 10, 1944 16 Claims.

. 1 This invention relates to apparatus for deliverlng liquids andviscous materials (hereinafter referred to as liquids) and applies inall cases wherein liquid is to be fed under pressure from a container toa plurality Of individual points.

For instance the invention. has particularreference. to lubricatingsystems in which a pump or propelling device is employed for feedinglubricant to a number of separate positions as in thecase ofc'hassis'lubrication for road vehicles, or in stationary machinery.

Our invention applies to that kind of apparatus which includes liquidpropelling means, such as a pump supplying liquid to a rotarydistributor and means for driving the rotary distributor so that itdelivers the liquid to each of a number of delivery conduits insuccession. Such apparatus is disclosed in our prior U. S. Patent No.2,157,970.-

One of the objects of the present invention is to provide improvedapparatus for delivering liquids and viscous materials under high.pressure by means of a rotary distributor co-operating with a stationaryring having a number of conduits wherein a delivery arm on the rotarydistributor is maintained in pressure contact with the ring duringdelivery .and wherein this pressure is relieved so that the rotarydistributor can turn from one position to another under light loadsupplied by a spring between the delivery periods.

A further object of the present invention is to deliver at any desiredpressure a; given quantityof liquid without loss due to leakage betweenthe contacting faces .of the rotary distributor and the member havingthe conduits to which the liquid is fed.

According to the present invention some or all of the pressure appliedto operate the pump plunger is transmitted during pump delivery, and

while the rotary distributor is stationary, to the contacting faces ofthe rotary distributor and the member having the conduits in a directionto prevent their separation, and the relation between the crosssectional area of the pump plunger, the area of contact between thecontacting faces of the, delivery arm of the rotary pump and when therotary distributor is movin around its axis but light pressure ismaintained between the contacting surfaces by a spring act- 'ing on thedistributor.

Movement of the pump plunger on the, delivery stroke is preferablyproduced by a mechanically driven rotary member which is provided withmeans for producing mechanically the rotary movement of the distributorduring the return movement of the pump plunger.

For instance the endwise movement of the pump plunger on the deliverystroke may be produced by a face cam mounted on an axis which isparallel to the axis of the rotary distributor and the face cam may havean eccentric pin engaging an oscillating member mounted on the rotarydistributor, the oscillating member carrying a pawl. engaging a ratchetWheel fixed to the rotary distributor.

The rotary distributor may have a pump portion of cylindrical formmounted for rotation in a circular opening in the ring having theconduits, the face of the ring being engaged by a delivery arm on thedistributor, a body formed as a hollow casing being secured to thisring,

this body containing the cam for producing the delivery stroke of thepump plunger and the endwise pressure on the pump plunger beingtransmitted to the rotary distributor and to its delivery arm.

Further the rotary distributor may be provided with one or morebalancing arms engaging the face of the ring and angularly spaced awayfrom the delivery arm so that when pressure is applied to the rotarydistributor parallel to the axis of the pumpand at right angles to theengaging faces of the ring and the delivery arm, there will be notendency to tilt the disdistributor and the member having conduits, and

the cross sectional area of the passage through which the liquid isforced, is such that the load on the pump plunger or this load plus thepressure of a spring acting on the distributor produces a pressure atthe contacting faces of the delivery arm of the rotary distributor andthe member having the conduits equal to or in excess of that required toensure a seal between these contacting surfaces:

The pressure between the contacting surfaces due to load on the pumpplunger is preferably removed after each delivery stroke of thetributor;

Pivoted to the casing we may provide an idler face of the cam, the idlerarm acting upon a memberwhich engages the pump plunger. By this meansthe side thrust produced by the rotation of the cam is absorbed and nottransmitted to the pump plunger.

The body of the appliance may serve to enclose worm or other reductiongear by which the cam operating the ump plunger is driven.

The appliance is preferably driven from .a rotating part, of thevehicleor machine, such, for instance, as the speedometer drive, so thatthe number of pump deliveries is proportional to the mileage of thevehicle, or, in the case of stationary machinery to the length of timethemechamsm is run.

Referring to the drawings:

Figure 1 is a plan view partly in section showing one construction inaccordance with the inr vention'.

one end H and contains a ring l2 having a circular row of-conduits 13,extending parallel to its axis, for receiving the deliveries of liquid.This ring I2 is 'detachably secured by screws M to the flange l5 of acap l6 closing the end of the casing lil'and secured thereto by bolts ILThe flange I5 is provided with an equivalent number of conduits l8 towhich delivery pipes i 9 areattached, leading away to the positionswhere the lubricant is required. Each of the conduits 18 contains anon-return valve 20. This part of the arrangement may be similar inprinciple to that disclosed in our prior British specification No.459,946.

An opening is provided through the ring E2 in which is fixed a bearing2| and mounted in this bearing is the rotary'distributor 22. The rotarydistributor 22 projects through the bearing 2! in the ring and the endof the distributor which projects through the bearing is enclosed by thecap l6.

The rotary distributor comprises a cylindrical body part 23 having aninlet port 24 and a discharge port 25 for the lubricant and having anaxial cylindrical passage 26 in which the endwise moving vpump plungeroperates. This pump plunger is in two-parts 21, 28, one of which 21 ispositively operated in one direction by a cam 29 and returned by aspring 30 acting on a washer 3| engaging a collar 32 on the part 21,while the other part 28 is spaced away from the end of the part 2! andis acted upon by a spring 33 tending to move it towards the plunger part21.

In the cylinder 26 in which these parts work, there isa gap 34 betweenthe two parts 21, 28 of the pump plunger and this gap becomes filledwith liquid through the inlet port 24 in the cylindrical body 23 of therotary distributor.

The two parts 21, 28 of the pump plunger move together with liquidimprisoned between their adjacent ends until the gap 34 containingtheliquid registers with the discharge port 25.

This port is provided with a non-return valve 35.

The two parts of the pump plunger move in an endwise direction with theliquid to be pumped imprisoned between their adjacent'ends until thisliquid is moved to a position opposite the delivery port 25, and ashoulder 36 near the end of the part 28 of the plunger comes intocontact with a cap 31 secured to the end of the rotary distributor body.Delivery then takes place and during delivery the cam pressure actingupon the pump plunger is transmitted by the shoulder 36 to the rotarydistributor body and keeps a delivery arm 38 on the said body inpressure contact with the ring l2 having the conduits through whichdelivery takes place.

The delivery arm 38 and the body 23 of the 39 leading to a passage 40 ina plug 4| mounted in the end of the delivery arm and engaging the faceof the ring l2.

The spring 38 operating to keep the face of the plug 4| in contact withthe face of the ring 12 at all times to allow pressure to be generatedas the pump plunger is operated.

The delivery arm 38 is also preferably provided with a branch passagecan be set to open at any predetermined pressure.

This permits of the escape of the liquid back -into the casing shouldthe pressure inv the pipe.

exceed the said predetermined pressure.

In order to balace the rotary distributor extending in a directionopposite to that of the delivery arm and having facings 46 engaging thering l2. Instead of engaging the ring l2 the balancing arms may. engageany other suitable structure such for instance as the flange l5.

These two further arms are spaced apart by a relatively small angle andfixed to the rotary distributor between these arms is a registeringdevice incorporating a pawl 41 pivoted at 48 to the arm 44 and actedupon by a spring 49 mounted on a pi 58 on the arm 45,'this pawl engagingin succession the teeth of a rachet" wheel 5] fixed on the bearing 2! soas to ensure distributor are provided with a delivery passage v thecorrect positioning of the delivery end or the passag through thedelivery arm in line with one of the receiving conduits in the ring, andpreventing return movement of the distributor after it has been moved bythe means now to be described. a g

The rotary distributor is given a step by step rotation so that deliveryis made at successive operations of the pump to separate conduits in thering l2.

For this purpose the rotary distributor has attached to it a ratchetwheel 52 which is acted upon by a pawl. 53 pivoted at 54 upon anoscillating ring 55, which ring is mounted upon a projecting cylindricalpart 56 of the rotary distributor. The arrangement is such that the ringis oscillated by means of an eccentric pin 51 on the rotary cam 29provided within the casing of the appliance, which cam is used forproducing the endwise movement of the pump plunger.

The oscillating ring 55 is provided with an 6| in which slides a squareblock 62 mounted on the eccentric pin 51.

Rotation of the cam 29 causes the pin 51 to move in a circular orbit andthe movement is translated by the block 62 moving in the radial slot 6|into an oscillating movement of the ring 55 causing the pawl 53 toadvancethe ratchet wheel 52 and the rotary distributor by one step.Backward movement of the rotary distributor on the return strok of thering 55 is prevented by the pawl 41 which engages with the stationaryratchet wheel 5|. I

The pump plunger has one end enclosed in a cap 63 which is engaged bythe end of the plunger 21. The spring 38 produces the return movement ofthe pump plunger.

The screwed cap 31 receives the endwise pressure from the pump plunger28 during the delivery stroke and this cap is provided with a' pair ofjaws 64 engaging flats upon a sleeve 68 screwed to the projecting end ofthe pump plunger 28.

Means are provided for adjusting the gap between the adjacent ends ofthe two parts 21, 28 of the pump plunger so that the volume of liquiddelivered at each delivery stroke can be adjusted, and such means maytake the form of a transverse pin 65 extending through the cap Hi, this42 communicating with the passage 38, the passage, being normally closedby a spring loaded safety valve 43 which 63 is of non-circular form sothat it can readily be turned and is provided with a flange 81 having, aportion which moves between two stops formed on the exterior of the capl6 so that rotarymotion of the pin 65 is limited to 180 and the positionof the flange 8'! in relation to the stops will give 5 an indication ofthe position of the eccentric part 66 of the pin in various adjustedpositions.

For driving the pump plungeron the delivery stroke the cam 29 isprovided and this is mounted to rotate about an' axis parallel with thatof the rotary distributor and is driven by worm gear Ill, H- situatedwithin the appliance. The casing of the appliance is provided withbearings 12 for the worm shaft 13 on which is the worm l0 engaging theworm-wheel I l' fixed upon the cylindrical boss 14 of the cam 29.

The worm is preferably fixed or formed intermediate the ends of the wormshaft 13 and both ends of the worm shaft are mounted in bearings 72 inthe casing and both ends may be formed or provided with means wherebythey may be placed indriving engagement with a driving shaft, in whichcase the arrangement would be such that the worm shaft can be drivenfrom either both ends of the worm shaft l3 with means so that they maybe engaged by a driving shaft, the construction illustrated in Figure 1may be employed and if it is desired to drive from the opposite side ofthe casing, the bearings 12 are taken out and placed in theoppositesides of the casin from the position shown in Figure 1, theshaft 73 being placed in the opposite way round. The cam 29 issymmetrical on either side of its highest point and for either directionof rotation it produces 'the necessary reciprocating movement of thepump plunger and the eccentric pin produces the step by step rotation ofthe rotary distributor.

The cam is mounted upon a sleeve-like hub 15 formed on a plate securedto the casing and the cam has a flange 16 which is secured to the sideof the worm wheel which rotates with its opposite side in contact withthe aforesaid plate. The

cam is a face cam, the face l1 being formed at the edge of the flange 16on the cam which is secured to the side of the worm wheel.

An idler arm i8 is pivoted at 19 within the casing containing the camand at right angles to the axis ofthe cam. At its fre end the idler armso is provided with a roller Bil bearing on the operative face of thecam and adjacent the roller, the idler arm is provided with a facing 8!which bears on the cap 63 which engages the end of the pump plungermember 2?. a 65 In the case of a vehicle the drive to the worm 75 shaftmay consist of a flexible or other shaft connected to a gear unitmounted on the speedometer drive, or to a rotating member in the gearbox; or a belt and pulley drive may be employed.

A modification is shown in Figure 7 wherein the ring I2 is secured tothe casing l0 instead of being secured to the flange ii of the cap I6.In this construction the flange I5 is separate from the cap it and thesetwo parts are separately secured to the end of the casing and thearrangement is such that the casing [0, ring l2, cap 16,

and the rotary distributor can be removed as a unit, leaving the flangel5 and its pipe connections undisturbed.

In carrying the invention into effect, regar must be paid to therelation between the diameter of the pump plunger, the areaof'contactbetween the facing at the end of the delivery arm of the rotarydistributor and the ring, and the cross sectional area of the conduitsthrough a which the liquid is to be forced. It is necessary that theload on the pump plunger together with the load provided by the spring30 shall produce a pressure at the contacting surfaces of the deliveryarm and conduit ring equal to or in excess of that required to ensure aseal between these contacting surfaces.

We have found that the necessary seal is obtained when using a pumpplunger one-quarter of an inch in diameter by using a spring 38 whichprovides a minimum load of five pounds and a passage 40 of one-sixteenthof an inch in diameter and a plug M having an end face which bears Y onthe ring, this end face being flve-sixteenths of end and in eitherdirection. Instead of making 35 an inch in diameter, this arrangementbeing used when the angle between the balancing arms M and i5 is about20 and all bearing on the same ring,

What we claim then is:

- 1. Apparatus for delivering liquids, comprising a hollow body throughone end of which extends a plurality of delivery openings, the innerends of which are disposed in a circularrrow, a rotary distributorarranged in said body co-axially with said row of openings, a pump insaid distributor, a radial arm on said distributor, said pump and saidarm having a delivery passage for liquid, said arm having a facingengaging said body and the delivery passage extending through saidfacing and registering in turn with the ends of each of said deliveryopenings said facing engaging at each delivery stroke of the pump only asmall marginal area of the body around the delivery opening with whichthe delivery passage registers, means for operating the pump, means forrotating the distributor with a step by step motion to bring the end ofthe delivery passage 2. Apparatus for delivering liquids, comprising ahollow body .including a casing, one end of which is closed by a flangedcap, the flange of which has a plurality of delivery openings, and aring within the casing and secured to the inner face of the flange ofthe cap, said ring having an equally spaced circular row of deliveryopenings extending through it from side to side, which openings registerwith openings through the flange, a rotary distributor arranged in saidbodyvco-axially with said row of openings, a

pump in said distributor, a radial arm on said distributor, said pump-andsaid arm having a delivery passage successively into register withthe ends of eachof said delivery openings in the ring, said pump havinga plunger reciprocating in the distributor parallel to the axis thereof,and means for transmitting the pressure of said piston, on the workingstroke only, to the rotary distributor to eflect a pressure sealbesuccessively into register with the ends of eacl of said deliveryopenings, said means operating between the delivery strok'es.

5.Apparatus,for delivering liquids, comprising a hollow body through oneend of which extends a plurality of delivery openings, the inner ends ofwhich are. disposed in a circular row, a rotary distributor arranged insaid body coaxially with said row of openings, a pump cylinder in saiddistributor, the axis of the cylinder being at right angles to a planecontaining the inner ends of said-delivery openings. a two-part pumpplunger'in said cylinder arranged with a tween the facing on' its armand-the side of the ring. a

- 3. Apparatus for delivering liquids, comprising a hollow bodyincluding a casing, one end of which is closed by a flanged cap, theflange of which has a plurality of delivery openings and a ring securedto and, projecting within the casing, said ring having an equally spacedcircular row of delivery openings extendingthrough it from side to side,which openings register with openings through the flange, a rotary distributor arranged in said body co-axially with said row of openings, apump in said distributor, a radial arm on said distributor, said pumpand said arm having a delivery passage for liquid,

said arm having a facing engaging one side of the ring, and the deliverypassage extending through said facing and registering in turn with thedelivery openings through the ring, means for operating the pump, meansforrotating the distributor with a step by step motion to bring the endof the delivery passage successively into register with the ends of eachof said delivery openings in the ring, said pump having a plungerreciprocating in the distributor parallel to the axis thereof, and meansfor transmitting the pressure of said piston, on the working strokeonly, to the rotary distributor to effect a pressure seal between thefacing on its arm and the side of the ring.

4. Apparatu for delivering liquids, comprising.

a hollow body through one end of which extends a plurality of deliveryopenings, the inner ends of which are disposed in a circular row,

a rotary distributor arranged in said body co.-'

axially with said row of openings, apump cylinder in said distributor,the axis of the cylinder being at right angles to a plane containing theinner ends of said delivery openings, a two-part pump plunger in saidcylinder arranged with a gap between their inner ends, said cylinderhaving liquid'inlet anddischarge ports which are spaced apart along thelength of the cylinder,

means for'reciprocating. one part of the pump plunger, means on theother part of the pum plunger for engaging an abutment in fixedrelationship with the distributor during the delivery or inward movementof the first part of the pump plunger, so that the pressure thereon istransmitted to the distributor during delivery only, a radial arm onsaid distributor, said pump and said arm having a delivery passage forliquid, said arm having a facing engaging said body and the deliverypassage extending through said facing and registering in turn with theends of each of said delivery openings and means for gap between their'inner ends, means for adjusting the length of. said gap, said cylinderhaving liquid 'inlet and disbharge ports which are spaced apart alongthe length of the cylinder, means for reciprocating one part of the pumpplunger, means on the other part of the pump plunger for engaging anabutment in fixed relationship with the distributor during the deliveryor inward movement of the first part of the pump plunger, so that thepressure thereoneis transmitted to-the distributor during delivery only,a radial arm on said distributor, said pump and said arm havingiadelivery passage for liquid, said arm having a facing engaging said bodyand the delivery passage extending through said facing and registeringin turn with the ends of each, of said delivery openings, and mean forrotating the distributor with a step by step mot-ion to bring the end ofthe delivery passage successively into register with the ends of each ofsaid delivery openings, said means operating between the deliverystrokes.

6. Apparatus for delivering liquids, comprising a hollow body throughone end of which extends a plurality of delivery openings, the innerends of which are disposed in a. circular row, a rotary distributorarranged in said body co-axially with said rowof openings, a pump insaid distributor, a radial arm on said distributon said pump and saidarm having a delivery passage for liquid,

' said arm having a facing engagin said body and the delivery passageextending through said facing and registering in turn with the ends ofeach of said delivery openings, means for operating the pump, means forrotating the distributor with a step by step motion to bring the end ofthe delivery passage successively into register with the ends of each ofsaid delivery openings, said means operating between the deliverystrokes, said pump having a plunger reciprocating in the distributorparallel to the axis thereof, and means for transmitting the pressure ofsaid plunger, on

the working stroke only, to the rotary distributor,

the area of contact between the contacting faces of the delivery arm andthe member having the conduits, and the cross sectional area of thederotating the distributor with a step by step motion to bring the endof the delivery passage .of which are disposed in a circular row, arotary distributor arranged in said body co-axially with said row ofopenings, a pump in said distributor,

a radial arm on said distributor, said pump and said arm having adelivery passage for liquid, said arx'n having a branch passage providedwith a relief port controlled by a spring-loaded valve,

and a facing for engaging the body, the delivery said facing engaging ateach delivery stroke of the pump only a small marginal area of the bodyaround the delivery opening with which the delivery passage registers.

8. Apparatus for delivering liquids, comprising a hollow body throughone end of which extends a plurality of delivery openings, the innerends of which are disposed in a circular row, a rotary distributorarranged in said body co-axially with said row of openings, a pumpcylinder in said distributor, the axis of the cylinder being at rightangles to a plane containing the inner ends of said delivery openings, atwo-part pump plunger in said cylinder arranged with a gap between theirinner ends, said cylinder having liquid inlet and discharge ports whichare-spaced apart along the length of the cylinder, a spring-loaded capslidably mounted in one end of the distributor, said cap bearing on theend of one part of from the second part of the-pump plunger 'during thedelivery stroke, a radial arm on said distributor, said pump and saidarm having a delivery passage for liquid, said arm having a facingengaging said body and the delivery passage extending through saidfacing and registering in turn with the ends of each of said deliveryopenings, and means for rotating the distributor with a step by stepmotion to bring the end of the delivery passage successively intoregister with the ends of each of said delivery openings, said meansoperating between the delivery strokes.

9. Apparatus for delivering liquids, comprising a hollow body throughoneend of which extends a plurality of delivery openings, the inner endsof which are disposed in a circular row, a rotary distributor arrangedin said body co-axially with said row of openings, a pump cylinder insaid distributor, the axis of the cylinder being at right angles to aplane containing the inner ends of said delivery openings, a two-partpump plunger in said cylinder arranged with a gap between their innerends, said cylinder having liquid inlet the inner surface'of the end ofsaid cap, a flange on said second pump plunger part, a spring within thecap acting on said flange, said second pump plunge-r part extendingthrough the end of said cap, a sleeve fixed on the end of said secondplunger part exterior to the cap, an adjusting pin extendingtransversely through the adjacent part of said hollow body, said pinengaging said sleeve for adjusting the length of the gap between theinner ends of the two pump plunger parts, a radial arm on saiddistributor, said pump tributor to efiect a'pressure seal between the 101 of said delivery openings, and means for rotating the distributor witha step by step motior to bring the end of the delivery passagesuccessively into register with the ends of each of said deliveryopenings, said means operating between the delivery strokes.

10. Apparatus for delivering liquids," comprising a hollow body throughone end of which extends a plurality of delivery openings, the innerends of which are disposed in a circular row, a rotary distributorarranged in said body co-axially with said row of openings, a pump insaid distributor, a plurality of radial arms on said distributor, saidpump and one of said arms having a delivery passage for liquid, saidarms engaging said body, and the arm with the delivery passage having afacing through which the passage extends, the end of said passageregistering in turn with the ends of each of said delivery openings,means for operating the pump, means for rotating the distributor with'astep by step motion to bring the end of the delivery passagesuccessively into register with the ends of each of said deliveryopenings, said pump having a plunger reciprocating in the distributorparallel to the axis thereof, and means for transmitting the pressure ofsaid plunger, on the working stroke, to the rotary disdistributor, aradial arm on said distributor, said pump and said arm having a deliverypassage for liquid, said arm having a facing engaging said and said armhaving a delivery passage for liquid,

, said arm having a facing engaging said body, and

the delivery passage extending through said facing and registering inturn with the ends of each body and the delivery passage extendingthrough said facing and registering in turn with the ends of each ofsaid delivery openings, means for operating the pump, a ratchet wheelfixed on the distributor concentrically with its axis, a ring mounted onsaid distributor for oscillatory movement, means for oscillating saidring, a pawl carried by said ring and engaging the ratchet Wheel, astationary ratchet Wheel mounted adjacent the distributor and having itsteeth directed oppositely from the teeth of the ratchet wheel on thedistributor, a. pawl on the distributor traversing the teeth of saidstationary ratchet wheel, said pump having a plunger reciprocating inthe distributor parallel to the axis thereof, and means for transmittingthe pressure of said plunger, on the working stroke, to the rotarydistributor to effect a pressure seal between the facing on its arm andthe part of the body'with which it engages.

12. Apparatus for delivering liquids, comprising a hollow body throughone end of which extends a plurality of delivery openings, the innerends of which are disposed in a circular row, a rotary distributorarranged in said body ccaxially with said row of openings, a pump instep motion to bring the end of the delivery passage successively intoregister with the ends of each of said delivery openings, said pumphaving a plunger reciprocating in the distributor parallel to the axisthereof, and means for transmitting the pressure. of said plunger, onthe working stroke, to the rotary distributor to eifect a pressure sealbetween the facing on its arm and the part of the body with which itengages.

13. Apparatus for delivering liquids, comprisl0 ing a hollow bodythrough one endof which extends a plurality of delivery openings, theinner ends of which are disposed in a circular row, a rotary distributorarranged in said body doaxially with said row of openings, 9, pump insaid 15 distributor, a radial arm on said distributor, said pump andsaid arm having a delivery passage for liquid, said arm having a facingengaging said body and the delivery passage extending through saidfacing and registering in turn with the ends of each of said deliveryopenings, means for operating the pump, a ratchet Wheel fixed: on thedistributor concentrically with its axis, a ring mounted on saiddistributor for oscillatory movement, a bearing hub fixed within saidhollow body, a face cam mounted on said hub for rotation, means forrotating said cam, said cam operating the pump, an eccentric pinprojecting axially from the end of said earn, a slotted arm on saidring, means on said eccentric pin engaging in the slot of the arm foroscillating the ring as the cam rotates, a pawl carried by said ring andengaging the ratchet wheel, a stationary ratchet wheel mounted adjacentthe distributor and having its teeth directed oppositely from the teeth5 of the ratchet wheel on the distributor, a pawl on the distributortraversing the teeth of said stationary ratchet wheel, said pump havinga plunger reciprocating in the distributor parallel to the axis thereof,and means for transmitting 4 the pressure of said plunger, on theworking stroke, to the rotary distributor to eifect a pressure sealbetween the facing on its arm and the part of the body with which itengages.

14. Apparatus for delivering liquids, comprising a hollow body throughone end of which extends a plurality of delivery openings, the innerends of which are disposed in a circular row, a rotary distributorarranged in said body co-axially with said row of openings, a pump insaid distributor, a radial arm on said distributor, said pump and saidarm having a delivery passage for liquid, said arm having a racingengaging said body and the delivery passage extending through saidfacing and'registering in turn with the ends of each of said deliveryopenings, a bearing hub fixed within said hollow body, a face cammounted on said hub for rotation, means for rotating said cam, an idlerarm pivoted within the hollow body having a portion engaged by said camand a openings, said pump having a plunger recipr'oeating in thedistributor parallel to the axis thereof, and means for transmitting thepressure of said plunger, on the working stroke, to the rotarydistributor to effect a pressure seal between the facing on its arm andthe part of the body with which it engages.

l2 15. Apparatus for delivering liquids, comprising a hollow bodythrough one end of whichextends a plurality of delivery openings, theinner ends of which are disposed in a circular row, a rotary distributorarranged in said body co-axially with said row of openings, a pump insaid distributor, a radial'arm on said distributor, said pump and saidarm having a delivery passage for liquid, said arm having a facingengaging said body and the delivery passage extending through saidfacing and registering in turn with the ends of each of said deliveryopenings, a bearlnghub fixed within said hollow body, a face cam mountedon said hub for rotation, a worm wheel fixed to said cam, a worm shaftmounted on bearings in the body, a worm on said shaft engaging said wormwheel, means for rotating the distributor with a step by step motion tobring the end of the delivery passage successively into register withthe. ends of each of said delivery openings, said pump having a plungerreciprocating in the distributor parallel to the axis thereof, and meansfor transmitting the pressure of said plunger, on the working stroke, tothe rotary distributor to effect a pressure seal between the facing onits arm and the part of the body with which it engages.

16. Apparatus for delivering liquids, comprising a hollow body, throughone end of which extends a plurality of delivery openings, the innerends of which are disposed in a circular row, a rotary distributorarranged in said body co-axially with said row of openings, areciprocating pump in said distributor, an outwardly projecting armonsaid distributor, said pump and said arm having a delivery passage forliquid, said arm engaging said body, and the delivery pass sageextending through said arm and registering in turn with the ends of saiddelivery openings said arm engaging the body, at each delivery stroke ofthe pump, over a small marginal area only around the delivery openingwith which the delivery passage registers, means for operatingthe pump,means for rotating the distributor with a step by step motion to bringthe end of the delivery passage in the arm successively into registerwith the ends of said delivery openings, said pump having a plungerreciprocating in the distributor parallel to the axis thereof,

and means for transmitting the pressure of said plunger on the workingstroke' only and when the distributor is stationary only, to thedistributor to effect a pressure seal between the end of the said armand the part of the body with which it engages.

HARRY PARKER.

THOMAS CARLYLE ELLISON ROWLAND.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 584,033 'Capitaine June 8, 18972,157,970 Rowland et al, May 9, 1939 FOREIGN PATENTS Number Country Date386,131 Great Britain 1933 480,978 Great Britain 1938

